Last-lock.



' F. J. SHAINSEY, SR;

LAST LOCK."

APPLICATION FILED FEB.24,1906.

Patented Nov. 2, 1909.

Mai/095565.-

UNITED TES PATENT FREDERICK Jenn SHAINSEY, sn, or DAYTOLLOHIO, AssIeNon,BY hrn'snn ASSIGN- MENTS, TO KRENTLER-ARN'OLD HINGE LAST COMPANY,OF'DETBOI'L'MiCHIGAN, A

CORPORATION OF MICHIGAN'.'

To all whom it may concern: 1 Be it known that I, FREDERICK JOHNSHAINSEY, Sn, a citizen ofUnit'ed States,-

residing at Dayton, county-of Montgomery, State of Ohio, United States,have invented an Improvement in Last-Locks, of .which the followingdescription, inconnection with the accompanying'drawings, is aspecification, like letters on the drawings represent-r like parts.

in 4. %n that class ofdivided lasts in which the heel-part has aswinging movement with relation to the forepart it is sometimesdesirable to' maintain the last unyielding lengthened position, and forthis pur ose various forms of locking devices-have eeri devised, many ofthem-being more or less complex and liable to wear out rapidly,

difiicult of accurate insertion, or .--e ensive. My present inventionaims to obviate the above named disadvantages while at the same timeproviding an automatic device .-which cannot readily get out of order.

The structural details of my invention will be pointed out more atlengthin the course of the following description, reference being had tothe accompanying drawings, in whichl is shown a -vent1on.

preferred-embodiment ofmy in- In the drawing, Figures 1 and 2 are viewsin side-elevation, showing the last in lengthened position and collapsedor shortened position respectively, the middle portion of the last beingbroken away toshow .the

hin ing and locking construction in detail.

'l he forepart a and heel-part b are herein shown as'jointed in themanner commonly known as the 2-piece last construction or knuckle joint,as shown in Patent 608,006

of July 26, 1898, the forepart having twin knuckles seating in a recessin the heel-part, and joined by a hinge-plate 0 set vertically of acircle, as indicated at 2', and receives the circular end 7: of atongue'or plate m, whose shoulder n'is caused to normally en age theadjacent portion of the hingelate by reason of a spring 8 held innotches between the normally separated lower edge of the LAST-Lock. I

' Specification of Letters Patent.

. Application filed February 24, 1906. Serial No; 302,678.

be collapsed into the positionshow-n in Fig.

ling device will endure as long as the la'st, I v

1 r'atented oe. 2,1909.

late m1 and top edge ei the plate c so as to engage a transv d of theforepart a., v 1 v The above construction affords an abso- 4 lutelypositive and exceedingly strong. lock,

. '60 simply a portion of the original plate from f which the hinge isstamped or died -out,:and j withouti material 00st"; The plate m is isheld in place by the converging circular wallsof the opening 2', so thatit cannot pull i out-lengthwise, and is held in place against lateralshifting by the walls of the Ikerfe, which the Hinge-plate c snuglyfits. No" lateral .twistin or springing of the lockin plate-m can ta eplace, because itsforwar end is retained in the kerf d. The spring 8cannot get out of place because it is retained, not only by the upperand' lower holding- ,notches, but also by the, side wallsof the 1 qkerfd, and yet it is always free to exert its" upward pressure.

parts of the last and depresses the-tongue m" slightly, whereupon thelast may readily 2. Upon straightening out or lengthening the parts ofthe last from the position shown in Fig. to the position-shown in Fig.1, the ton e m immediately springs up into locking enga em'ent with thepin 3; when 85 the last isful y lengthened. Preferably the arrangementis such that the-pin p and the center of the socket portionla are in aline tangential to the pivotal center f, the strain being in a directionbetween the twoiris hand 9, thereby distributing the strain to the bestadvantage. p It will be understood that my invention may beapplied toany of the various hinged last connections employing a vertical kerf andbondingumeans moving "thereinv. By having the locking tongue orcompression brace m and the hinge-plate in one-and the same plane andbearing directly against each 19 ment I attain at once greatstrength'and other, according to my preferred embodi simplicity andavoidjundue' wear I of the parts. There is no wedging partbearing on thewood of the last, andihencefthe-lock' The interlocking arrangementmay"be' varied in shape of parts, as long as-the mainfeatures, as aboveppinted out, i

erse stop-pin p the kerf In use the jack is provided with: a suitablezfinger, which enters the gap between the'two will be understood that myinvention may be carried out in a wide variety of embodiments within thespirit and scope of the appended claims. I

Having described my invention, what I claim as new and desire to secureby Letters Patent, is:

1. In a transversely divided last, having its heel-part movablerelatively to the forepart, said two parts having vertical kerfsin theiradjacent ends, connecting means including a rigid plate secured in saidkerfs to said forepart and heel-part respectively, and a rigidcompression member pivoted 1n the plane of said kerfs, carried by andmovable with and also relatively to said plate and adapted to lock theparts of the last r g dly extendedwhen in one position, and to permitthe free collapsing movement of said 2 last-parts when in anotherposition.

2. In a transversely divided last, having, its heel-part'movablerelatively to the forepart, said two parts having vertical kerfs intheir adjacent ends, connecting means includin a rigid plate secured insaid kerfs 1 to sai forepart and heel-partrespectively', v-and a movablelocking mechanism pivotally, mounted in the plane of said kerfs, carriedby and movable with and also relatively to said late and adapted to lockthe parts'of the ast rigidly extended when inone position, and'to permitthefree collapsing movement of said last-parts when in another position,said locking mechanism having its pivot and its opposite locking endboth substantially in the arc of swinging movement of the last parts,being externally operable and'incl'ud- .1ng a spring-normally tending tomove the same into locking position.

40 3. In a transversely divided last, having its heel-part movablerelatively to the forepart, said two parts having vertical kerfs intheir adjacent ends, connecting means .in-

cludi' a rigid plate secured in said kerfs' to sai forepart andheel-part respectively,

and a rigid compression member pivoted in 'the'plane of said kerfs{carried by and movable with and also re atively to said plate andadapted to extend from one last part to the other and to braceagainst'said last part and thereby to lock the last rigidly extendedwhen in one position, and to per-- mitthe free collapsing movement ofsaid lastarts when in another position, said locking mechanism beingexternally operable.

4. In a transversely divided last, having an open s we at the'top in theline of di vision an vertical kerfs. in the adjacent ends, connectingmeans secured in said kerfs to the forepart and heel-part respectively,a lockin device mounted in said kerfs and extending across said openspace into both said rfs above said connecting means, said 7 last pgrts,and a transverse pin in one of device, when the last-parts are inlOCklli? exten ed-position, bracing rigidly between said pin at one endin one last-part and the connecting means at the other end in the otherlast-part, said locking device being adapted to be deflected downwardlywithin the last to permit the parts of the last to have movement onerelativel to the other.

5. In a transversely divi ed last, having an open space at the top inthe line of diextending into said open space, a transverse vision andvertical kerfs-in the adjacent connecting means secured in sald kerfsectively,

pin in one of said kerfs .above said connectmg means, and a springnormally tendin to move said locking device outwardly, sai

locking device, when the last-parts are in extended position, bracingrigidly between said pin at one end in one last-part and the connectingmeans at the other end .in the other last-part, said locking devicebeing ada ted to be deflected downwardly within the ast in opposition tosaid spring to permit the parts of the last to have movement i onerelatively to the other.

6. In a transversely divided last, having an open s ace at the top inthe lineof d1- vision an vertical kerfs .in the adjacent ends,connecting means secured in said kerfs to the forepart and heel-partrespectively,

a locking device mounted in said kerfs, having pivotal connection at oneend with said connecting means to move with one of said' last-parts, andextending into said open space, a transverse pin in the other of saidlast-parts in position to be engaged-by the front end of said lockingdevice'when the last-parts are in extended position, and a springnormally tending to move said looking device into said enga ed positionto lock the last-parts unyielding y together when in' I said extendedposition.

7. A divided last, having a vertical hingearts of the last, Y

of said plate,

plate pivotally joining the containing a socket in one e e a rigidlocking tongue movaily retained to swing in said socket adjacent onelast part, and a transverse stop-pin extending trans versely. throughthe opposite last part across the end of said tongue when the last is inlengthened osition. 1

8. A d1v'i ed last having a vertical hingeplate pivotally joining theparts of the last, containin a socket in one edge of said plate, aocking tongue movably retained to swing in- Sald' socket, a. transversestop normally in the path of said tongue and a spring between theadjacent edges of said tongue and tongue in posltion to engage said sto9. A divided last having a vertical hingeplate and a'rigid lockin plateattached to said hinge-plate, said Iocln'ng plate plate, normallyholding said 938,903 &

hinge-plate being movable i-elatively'ahd 'both last parts at itsopposite ends respeo- 10 also together and both standing in the sametively. vertical plane in the last, and opposite kerfs In testimonywhereof, I have signed my in the forepart and heel-part respectively,name to this specification, in the presence of constituting the entiremeans of holding said two subscribing witnesses.

combined hinge and lock against relative FREDERICK JOHN SHAINSEY, SR.lateral movement out of said vertical plane, fitnesses: said lockingplate lying above the top edge W. H. H. Eom,

of the hinge-plate and engaging at all times MAY B. MA'rHER.

